MINOR: session: add a pointer to the session's origin

A session's origin is the entity that was responsible for creating
the session. It can be an applet or a connection for now.

include/types/session.h

@@ -38,6 +38,7 @@
 struct session {
 	struct proxy *fe;               /* the proxy this session depends on for the client side */
 	struct listener *listener;      /* the listener by which the request arrived */
+	enum obj_type *origin;          /* the connection / applet which initiated this session */
 };
 
 #endif /* _TYPES_SESSION_H */

src/hlua.c

@@ -2197,6 +2197,8 @@ __LJMP static int hlua_socket_new(lua_State *L)
 		goto out_fail_conn1;
 	appctx->ctx.hlua.socket = socket;
 	appctx->ctx.hlua.connected = 0;
+	socket->s->sess->origin = &appctx->obj_type;
+
 	LIST_INIT(&appctx->ctx.hlua.wake_on_write);
 	LIST_INIT(&appctx->ctx.hlua.wake_on_read);
 

src/peers.c

@@ -1169,6 +1169,7 @@ static struct stream *peer_session_create(struct peer *peer, struct peer_session
 		goto out_fail_conn1;
 	appctx->st0 = PEER_SESS_ST_CONNECT;
 	appctx->ctx.peers.ptr = (void *)ps;
+	s->sess->origin = &appctx->obj_type;
 
 	si_reset(&s->si[1]);
 

src/stream.c

@@ -123,6 +123,7 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
 
 	s->sess->listener = l;
 	s->sess->fe  = p;
+	s->sess->origin = &cli_conn->obj_type;
 
 	s->si[0].flags = SI_FL_NONE;
 	s->si[1].flags = SI_FL_ISBACK;